21009904

素因数分解:

$2^4\times {\mathrm{587}}^1\times {\mathrm{2237}}^1$

素因数の和:2832

約数の個数: 20

約数和(自身を含む): 40794264

約数和(自身を除く): 19784360

約数列:

[1, 2, 4, 8, 16, 587, 1174, 2237, 2348, 4474, 4696, 8948, 9392, 17896, 35792, 1313119, 2626238, 5252476, 10504952, 21009904]

約数ペア:

[(1, 21009904), (2, 10504952), (4, 5252476), (8, 2626238), (16, 1313119), (587, 35792), (1174, 17896), (2237, 9392), (2348, 8948), (4474, 4696)]